diff --git a/tests/manager/manager-ctor-appname-001.phpt b/tests/manager/manager-ctor-appname-001.phpt
new file mode 100644
index 00000000..6141a8df
--- /dev/null
+++ b/tests/manager/manager-ctor-appname-001.phpt
@@ -0,0 +1,20 @@
+--TEST--
+MongoDB\Driver\Manager::__construct(): appname option
+--SKIPIF--
+<?php require __DIR__ . "/../utils/basic-skipif.inc"; CLEANUP(STANDALONE) ?>
+--FILE--
+<?php
+
+require_once __DIR__ . "/../utils/basic.inc";
+
+$name1 = str_repeat('PHONGO', 20);
+$name2 = str_repeat('PHONGO', 20);
+$manager = new \MongoDB\Driver\Manager(STANDALONE . "/?appname={$name1}", ['appname' => "2-{$name2}"]);
+
+$command = new MongoDB\Driver\Command(['ping' => 1]);
+$manager->executeCommand("test", $command);
+
+?>
+===DONE===
+--EXPECT--
+===DONE===
diff --git a/tests/manager/manager-ctor-appname_error-001.phpt b/tests/manager/manager-ctor-appname_error-001.phpt
new file mode 100644
index 00000000..2f9db5a5
--- /dev/null
+++ b/tests/manager/manager-ctor-appname_error-001.phpt
@@ -0,0 +1,21 @@
+--TEST--
+MongoDB\Driver\Manager::__construct(): invalid appname
+--FILE--
+<?php
+
+require_once __DIR__ . '/../utils/tools.php';
+
+echo throws(function() {
+    $name1 = str_repeat('PHONGO', 20);
+    $name2 = str_repeat('PHONGO', 200);
+
+    $manager = new \MongoDB\Driver\Manager("mongodb://127.0.0.1/?appname={$name1}", ['appname' => "2-{$name2}"]);
+}, "MongoDB\Driver\Exception\InvalidArgumentException"), "\n";
+
+?>
+===DONE===
+<?php exit(0); ?>
+--EXPECT--
+OK: Got MongoDB\Driver\Exception\InvalidArgumentException
+Invalid appname value: '2-PHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGOPHONGO'
+===DONE===